submersible warship

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Noun1.submersible warship - a warship designed to operate under water
pigboat, submarine, U-boat, sub - a submersible warship usually armed with torpedoes
combat ship, war vessel, warship - a government ship that is available for waging war
References in periodicals archive ?
The German Type XXI high-speed, long-endurance, diesel-electric submarine was arguably the first modern submarine--a truly submersible warship.
The hour long programme also followed engineers, designers and skilled craftsmen as they worked on the awe-inspiring submersible warship, from the initial stages of production to its first journey into the open sea.